.html-content {
  font-size: 14px!important;
  line-height: 1.5;
  -ms-text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif!important;
  * img,* video,* audio,img,video,.audio{
      border-style: none;
      max-width: 100%!important;
      display: block!important;
      margin: 0 auto;
      height: auto!important;
  }
  * table,table{
    width: 100%!important;
    border: 1px solid #333!important;
    border-collapse: collapse!important;
    td {
      border: 1px solid #333!important;
    }
  }
  p{margin-top:0.5em!important;margin-bottom:0.5em!important;font-size: 14px!important;}
}